微机测湿系统中的粮食湿度变送电路

Grain Humidity Converting of the Computer Humidity Testing System

论述了一种结构简单、灵敏度高、动态范围大、便于和计算机连接的粮食湿度变送电路的组成及工作原理，提出了对该变送电路非线性和温度特性进行补偿的必要性和具体方法。应用它可提高测量精度，使测量更简便、迅速。

The present paper discusses the composition and principle of the grain humidi^ty converting circuit, which has the charecteristics of simple structure, high sensitivity, wide measuring range and convenient connection to computers. It puts forward an practicable approach to compensate the temperature property and non-linearity of the circuit, and provides a precise, easy and speady humidity measuring method.